CAJ | 학술논문

Si O 2微球是齿科树脂的重要填充物,为进一步研究其对齿科树脂性能的影响,采用溶胶-凝胶法制备纳米Si O 2微球,并将其改性后应用于齿科树脂中,通过 FT-IR、SEM、TEM、激光粒度分析仪、微机控制万能拉伸试验机、DMA 等对制备的 Si O 2及其齿科复合材料进行表征分析.结果表明,γ-甲基丙烯酰氧基丙基三甲氧基硅烷成功改性SiO2,得到的SiO2微球分散性较好,呈规则的球形,平均粒径为450 nm；复合材料的强度与填充量有关,随着 Si O 2含量的增多力学性能增大,当填充量为45％时,复合材料的力学性能最大,弯曲强度为123．682 MPa,压缩强度为208．802 MPa,E′和 tanδ均达到最大值,并分析了力学性能存在差异的原因.
Si O 2미구시치과수지적중요전충물,위진일보연구기대치과수지성능적영향,채용용효-응효법제비납미Si O 2미구,병장기개성후응용우치과수지중,통과 FT-IR、SEM、TEM、격광립도분석의、미궤공제만능랍신시험궤、DMA 등대제비적 Si O 2급기치과복합재료진행표정분석.결과표명,γ-갑기병희선양기병기삼갑양기규완성공개성SiO2,득도적SiO2미구분산성교호,정규칙적구형,평균립경위450 nm；복합재료적강도여전충량유관,수착 Si O 2함량적증다역학성능증대,당전충량위45％시,복합재료적역학성능최대,만곡강도위123．682 MPa,압축강도위208．802 MPa,E′화 tanδ균체도최대치,병분석료역학성능존재차이적원인.
Silica microspheres,as an important kind of fillers,have great impact on mechanical and thermal properties of dental resin.In this article,silica microspheres were prepared by sol-gel method and applied in modification of dental resin.The appearance and size of SiO2 microspheres were characterized by Fourier trans-form infrared spectroscopy (FT-IR),scanning electron microscope (SEM),transmission electron microscope (TEM),dynamic light scattering (DLS).It showed that SiO2 particles were successfully modified by KH-570 and had global microspheres with homogenous size and distribution (average diameter 450nm).The mechanical and thermal performances of dental composite were tested by universal testing machine and dynamic thermo-mechanical analysis (DMA).It found that the roughness,glass transition temperature Tg and the storage mod-ulus E′increased with increasing of silica content,but the strength and compression strength first increased and then decreased.By optimizing the content of silica,the ratio of silica was approach 45wt%,the value of bending and compression strength reached maximum (123.682 and 208.802 MPa respectively).The effect of silica micro-spheres on the mechanical performance and thermostability was discussed and its possible reasons were ana-lyzed.